Abstract
Genotyping errors can perturb estimates of genetic diversity and adversely affects the reliability of forensic identification, which has become increasingly recognized. During our daily laboratory work, we hit upon a discordant short tandem repeat (STR) genotype at the D2S1338 locus between Identifiler Plus®16 system kit and Power Plex®21 system kit. To figure out the reason of the discordance, nested PCR was performed to amplify the D2S1338 locus and then the final amplicons were sequenced. We found a G to G/A transition at the position on which caused an allele dropout of Identifiler Plus®16 kit.
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